AS3257 208.116.136.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 2048208.116.136.0/24208.116.137.0/24208.116.138.0/24208.116.139.0/24208.116.140.0/24208.116.141.0/24208.116.142.0/24208.116.143.0/24